Adjustable bracket.



T. SMITH.

ADJUSTABLE BRAGKET. i APPLICATION :FILED SBPT.17, 1908.

Patented June 7, 1910.

THEODORE SMITl', OF CHICAGO,A ILLNOIS.

ADJUSTABLE BRACKET.

Specification of Letters Patent.

Patented June 7, 1910.

Application filed September 17, 1908. Serial No. 453,404.

To all who/mit may concern:

A citizen of the United States, residing at dao Chicago, in the county of Cook and' State of Illinols, have invented a certain new and useful Improvement in Adjustable' Brackets, of which the following is a specification.

This invention relates to adjustable brackets, and has for its object to provide a new and improved device of this description.

4The invention is illustrated in the accompanying drawings, wherein- Figure 1 is a view of a `device embodying the invention; Fig. 2 is a sectional view through the portion of the bracket fixed to the base; Figs. 3, 4 and 5 are views showing separately the parts whichare put together to form the upper end of theportion of the bracket fixed to the base; Fig. 6 is a sectional view taken on line 6 6 of Fig. 1; Fig. 7 'is a sectional view taken on line 7-7 of Fig. 2.

Like numerals refer to like parts throughout the several figures.

Referring now to the drawings, a swinging arm 1 is provided at one end with a lamp or other part 2 in connection with which the .device is used. Associated with the swinging arm 1 is the frictional part 3,

'laterally projecting shoulders 8 on the movj able spring-pressed part 9. The friction part 3 also has friction surfaces 10 (see Fig. 6) which engage the sides of the supporting piece 4, vand this-friction is regulated by means of the nut 11 on the threaded end of the pivot 5. A

The supporting piece 4, as herein illustrated, is screw threaded as shown in Fig. 3, and is screwed into the end of the tube 12 fastened to the base 13 of the device. The

. support may be adjusted up and down in port 4 is free to rotate so that the swinging arm -may beadjusted about the base in addition to being adjusted up and down about the pivot 5, suitable stop is provided to limitxthe4 rotation ofthe support 4. As

herein shown a ring 15 surrounds the support 4 and the tube 12, and is provided with a screw 16 screwed therein and projecting into a slot or cutaway portion17 in the tube 12, and a slot or cutaway portion 18 in the support 4. It will thus be'seen that when the swinging arm is rotated it will move a certain distance until the edge of the slot 18 will come into contact with the screw or stop piece 16, whereupon the screw or stop piece will move in the slot or cutaway portion 17 until it strikes the edge thereof, whereuponv the movement will be stopped. It will be seen that by this construction substantially a complete rotation may be secured, and'then the movement stopped. It will further be seen that the movement will be equal to the sum of the length of the two slots 17 and 18.

The spring-pressed piece 9 is adjustably connectedwith the adjustable piece 19 in any suitable manner, as by a screw thread connection, and is slidably mounted upon the tube 12. A spring 20 engages a stationary part, such as the base 13 at one end engaging the adjustable piece 19, thus tending to push it and the spring-pressed part 9 into contact with the eccentric friction pieces 6. The tension of the spring, and hence the force exertedl upon the springpressed piece 9 can be adjusted by rotating the adjustable piece 19 so as to compress or release the. spring. If, for example, the device is used for an electric light Xture,"the conductors 21 may be made to pass through an opening 22 in the swinging arm which is above the pivot 5; instead of passing out throu h the opening 22the conductors may pass vt rough the support 4 and the tube 12 into the hollow portion of the base 13, and out through the opening 23 therein, The conductors in this case' are, as it were, fixed to vthe swinging arm 1 and are movable with relation to the other part of the device, that is, the support4 and tube 12, and are arranged so that as the swinging arm 1 is moved up and down these conductors can move up and down with it inside of the tube 12 without injury to the parts. It will .thus be seen that the -swinging arm 1 may be moved up or down so as to adjust it to any vertical position, and that it will remain in such position when released. It will further be seen thatthe spring 2()y acts as a spring lift to assist in moving the swinging arm to any of its various vertical positions, for

the pressure of the spring on the eccentric frictlon pieces 6 ten s to lift the swinging arm. This tendency may be adjusted and controlled by adjusting the tension ofrthe '5 spring, and by tightening or loosening the swm g arm is rotated.

I clijim:

1. An adjustable bracket, comprising a swinging arm, an eccentric frictional part fixed to and moving with said arm, a movable part elastically mounted and separate from said arm and having contact with said eccentric frictional part.

. swinging 2.- An adjustable` bracket, comprising a ,20 swinging arm apart to which it is' pivotally connecte a friction piece connected with said arm, and having e an eccentric friction contact face, a base, a tube projecting therefrom, a movable part elastically mounted thereon and engaging lsaid eccentric face.

3. An adjustable bracket, comprising a arm, a supporting device therefor, horlzontal and vertical frictional surfaces associated with said support, friction parts on the swinging arm engaging said frictional surfaces said frictional surfaces slidably mounted upon said supporting device, and means for adjusting the friction between the parts on the swinging arm and said frictional surfaces.

4. An .adjustable bracket, comprising a Swingin arm, africtional part connected therewit two frictional pieces associated with said part and having eccentric frictional faces, a supporting piece upon which said Swingin arm is mounted and located between sai frictional pieces, a movable part elastically mounted engaged by said eccentric frictional faces.

5. An adjustable bracket, comprising abase a swinging arm, a frictional part connected therewith, two frictional pieces associated with said part-and having eccen- `tric frictional faces, a supporting piece upon which -said swinging arm is mounted and located between said frictional pieces, a movable part engaging. said eccentric frictional faces, and a spring associatedA with `said movable part and pressing against said faces, said sprlng mounted upon said base.

6. An adjustable bracket, comprising a swinging arm, a part to which said swinging arm 1s pivoted, a spring beyond said swinging arm and outof contact therewith, but

adapted .to act upon the said swinging arm so as to tend to move it about its pivot, and a friction device for holding the swinging arm against movement when released.

7 An adjustable bracket comprising two sections .pivoted together one consisting of a hollow arm, a base to which the'other section is attached, the pivotal point of the section attached to the base being at one side of the axis thereof a pivot uniting the sections at said pivotal polnt.

8. An adjustable bracket, comprising two sections pivoted together, one consisting of a hollow arm, ,the pivotal point of the other section being at one side of the axis thereof, a base with which said latter section is connected, an eccentric frictional face associated with said hollow arm, and a movable springpressed partV engaging said frictional face, said spuug-pressed part mounted upon the section connected with said base.

9. An adjustable bracket comprising a swinging arm, a support to which it is pivoted, said support rotatably mounted and being provided with a slot, a tube surrounding said support and provided with a slot, a ring surrounding said support and tube and provided'with a projecting part which projects into both slots.

10. `An adjustable bracket comprising a swinging arm, a support to which it is pivoted, a tube in which said su port is rotatably mounted, said tube an support cut away in the same plane, an exterior part surrounding'said tube and support, a stop carried by said exterior part and extendin intlzo the cutaway portions of the support an tu e.

11. An adjustable bracket, comprising a base, a tube connected thereto, a spring surrounding said tube, a movable part sliding upon said tube, a support connected with said tube, a swinging arm pivoted to said support, frictional, eccentric faces connected wit 'sald swinging arm and engagingA said movable part on the tube, an Y adjustable piece connected with said movable part and engaging said spring.

12. An' adjustable bracket, comprising. a base, a tube connected thereto, a spring surrounding said tube, a movable part sliding upon sald tube, a support connected with said't'ube, a swinging arm pivoted to ,said support, frictional, eccentric faces connected with said vswinging arm and engaging said movable part on the tube,l an adjustable piece connected with said movable part and' engaging said s ring, and means for adjusting said adjusta le part with relation to the movable part with which it is connected.

13. An adjustable bracket, comprising a swinging arm,'a part to which said swinging arm 1s lvoted, a spring beyond said swinging arm and out of contact therewith, but adapted to act upon said swinging arm so as to tend to move it about its pivot, a friction device for holding, the swinging arm against movement when released, the part to which the swinging arm is pivoted being rotatably mounted.

Y part.

1 4.,An adjustable bracket, comprising a swingingarlm a support having a laterally projecting head, a pivot connecting said swinging arm with said head at oneside of the axis thereof,`a tube to which said head is connected, va spring-pressed part on said tube, an eccentric frictional face lon the swinging arm engaging said springepressed t 15. An `adjustable bracket, comprising a swinging arm, a support having a laterally projecting head, a pivot connecting said swinging arm with said head at one side of the axis thereof, a tube to which said head is connected, a spring-pressed. part on said tube, an eccentric frictional face on the swinging arm engaging said spring-pressed part, the -end of said spring-,pressed part. projecting past said eccentricfrictional face on the swinging arm.

16. An adjustable. bracket comprising a base, a ltube connected therewith, said base hollowed out around said tube, a spring in the hollow portion of said base and surrounding said tube, a swinging arm carried by said tube, a frictional part engaging said swinging arm and slidably moupted about said tube, said frictional part being pressed toward the swinging arm by said spring.

17. An adjustable bracket' comprising a swinging arm, a Ssupporting device upon which it is mounted, a stationary part with which said supporting device .is movably connected, said supporting device. and stationary part provided with slots which-register under predetermined conditions, an associated part provided with a projection which enters both of said slots, whereby said supporting part is heldin place and its rotation limited.

-Signed at Chicago, Illinois, this 10th day of September, 1908.

THEODORE SMITH. Witnesses:

EDNA K.`REYNoLns, SOPHIE B. WERNER. 

